About of Computer

As the technology used in digital computers has changed dramatically since the first computer in the 1940s (see History of the hardware count for more detail), most computers still use the von Neumann architecture, which was proposed in the early 1940s by John von Neumann .

Von Neumann architecture describes a computer with four main sections: Arithmetic and Logical Unit (ALU), control unit, memory, and input devices and the results (collectively called I / O). This section is connected by a wire file, "bus"

In this system, the memory bytes are numbered sequence (such as "cell" or "pigeon holes"), each containing a small piece of information. This information may be a command to tell the computer what to do. Tues may contain computer data needed to perform a command. Each slot may contain one, and what is now the data may then be ordered.

A memory storing various forms of information as binary numbers. The information will not be resolved binary form (encoded) with a number of instructions to turn it into a sequence of numbers or figures. For example: The letter F is stored as a decimal number 70 (or binary digits) using one method of solving. More complex instructions can be used to store images, sound, video, and various kinds of information. The information can be stored in a sell is called a byte.

In general, the memory can be rewritten over a million times - the memory can be thought of as a blackboard and chalk that can be written and erased again, rather than a legal pad with a pen that can not be deleted.

The size of each cell, and cell numbers, a great change from computer to computer, and technology in the manufacture of memory has changed greatly - from Electromechanical relays, to a tube filled with mercury (and later spring) in which the acoustic pulse is formed, until the permanent magnet matrix, to each transistor, the integrated circuits with millions of transistors on a single silicon chip